
adverb
- at a later or subsequent time; subsequently.
adverb
- after an earlier event or time; subsequently
c.1300, from afterward (q.v.) + adverbial genitive -s; originally a Northern form.
Old English æftanweard, from æftan “after” (see aft) + -weard suffix indicating direction (see -ward); nautical use as aftward, then expanded by influence of after; variant afterwards shows adverbial genitive.